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Proceedings Paper

Temporal pure single photons generated from time-frequency entangled biphotons
Author(s): Qian Peng; Zhejie Gu; J. F. Chen; Weiping Zhang
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Paper Abstract

Narrow-band time-frequency entangled biphotons are generated from spontaneous four-wave mixing in cold atom clouds. The coherence time of the entangled biphotons can be extended to sub-microseconds by the slow light effect. The temporal wavefunction of the biphotons can be manipulated through modulating the spectral or spatial mode of the controlling laser beams. Concerning a pair of entangled biphoton and the resulting heralded single photon, it was commonly believed that, time-frequency entanglement damages the temporal purity of the single photon. However, the case is totally different for biphotons with long coherence time which is far beyond the time resolution of single-photondetectors. We demonstrate that, the single photon heralded from these time-frequency entangled biphotons is in a pure temporal state. Therefore, single photons are able to be shaped through the time-frequency entanglement with their partner photons, while the single photons could be found to be still in a pure state and thus useful for quantum information processing and communication technology.

Paper Details

Date Published: 3 November 2016
PDF: 5 pages
Proc. SPIE 10029, Quantum and Nonlinear Optics IV, 1002902 (3 November 2016); doi: 10.1117/12.2245435
Show Author Affiliations
Qian Peng, East China Normal Univ. (China)
Zhejie Gu, East China Normal Univ. (China)
J. F. Chen, East China Normal Univ. (China)
Weiping Zhang, East China Normal Univ. (China)
Shanghai Jiao Tong Univ. (China)


Published in SPIE Proceedings Vol. 10029:
Quantum and Nonlinear Optics IV
Qihuang Gong; Guang-Can Guo; Byoung Seung Ham, Editor(s)

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